Has anyone found that airlines object to the size of a carried camera?
My mother at 80 used to travel with her coat stuffed so she looked like an enormous hippo! They let her travel!
The airlines in the USA allow one laptop bag, one travel case as we have been discussing as well, if you are a photographer, an extra bag, the size of which I'm not sure about.
However, if you travel to Europe like that, you may be in deep trouble!
AFAIK, say goodbye to the photographer's bag! Also you may have to empty your Think Tank Airport Security roller.
So you must not only check what airline you are traveling on, but also alternate airlines should the flight get altered!
In general, one must reassess what one MUST have rather than could have. Also look to renting when you arrive.
Travel anyway can be miserable, schlepping around and keeping an eye on your gear.
In the USA they are generous.
Asher